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PTHREAD_SUSPEND_NP(3)	  OpenBSD Programmer's Manual	 PTHREAD_SUSPEND_NP(3)

NAME
     pthread_suspend_np, pthread_suspend_all_np, pthread_resume_np,
     pthread_resume_all_np - suspend and resume thread(s)

SYNOPSIS
     #include <pthread.h>
     #include <pthread_np.h>

     int
     pthread_suspend_np(pthread_t thread);

     void
     pthread_suspend_all_np(void);

     int
     pthread_resume_np(pthread_t thread);

     void
     pthread_resume_all_np(void);

DESCRIPTION
     The pthread_suspend_np() function interrupts the given thread and places
     it in a suspended state.

     The pthread_suspend_all_np() function interrupts all threads except the
     current thread and places them in a suspended state.

     The pthread_resume_np() function resumes a thread suspended with
     pthread_suspend_np() or pthread_suspend_all_np().

     The pthread_resume_all_np() function resumes all threads suspended with
     pthread_suspend_np() or pthread_suspend_all_np().

     The pthread_resume_np() and pthread_resume_all_np() functions have no
     effect on threads that have not been suspended.

     Suspending and resuming a thread has an effect similar to that of
     receiving a signal, namely that resumed system calls will return an error
     value of EINTR.

RETURN VALUES
     The pthread_suspend_np() and pthread_resume_np() functions fail if:

     [ESRCH]	   No thread could be found corresponding to that specified by
		   the given thread ID.

     The pthread_suspend_np() function fails if:

     [EDEADLK]	   Attempt to suspend the current thread.

SEE ALSO
     pthread_cancel(3), pthreads(3)

STANDARDS
     The pthread_suspend_np(), pthread_suspend_all_np(), pthread_resume_np()
     and pthread_resume_all_np() functions are non-portable and may not be
     supported with the above semantics on other POSIX systems.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9

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